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Siemens 3VA1225-1AA32-0AG0 — Molded Case Circuit Breakers (MCCB)

Siemens 3VA1225-1AA32-0AG0 SENTRON Switch Disconnector, 250

MPN3VA1225-1AA32-0AG0

Siemens SENTRON 3VA1225-1AA32-0AG0, switch disconnector in MCCB design, 3-pole, 250 A at 40-50 °C, 690 V AC, busbar connection, front terminal, IP40 front.

Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

3VA1225-1AA32-0AG0 — Identification
ParameterValue
Product designationSwitch disconnector
Brand / rangeSENTRON
3VA1225-1AA32-0AG0 — Ratings
ParameterValue
Number of poles3
Rated operational voltage Ue (AC)690 V
Rated insulation voltage Ui800 V
Current at 40 °C250 A
Current at 45 °C250 A
Current at 50 °C250 A
Current at 55 °C243 A
Current at 60 °C237 A
Current at 65 °C230 A
Current at 70 °C223 A
Power loss, max.57 W
3VA1225-1AA32-0AG0 — Construction & Connection
ParameterValue
Main circuit connection typebusbar connection
Main circuit connector arrangementFront terminal
Protection class (IP), frontIP40
3VA1225-1AA32-0AG0 — Accessories & Functions
ParameterValue
Undervoltage releaseNo
Voltage triggerNo
Trip indicatorYes
Motor drive optionYes
Auxiliary CO contacts2
3VA1225-1AA32-0AG0 — Environmental
ParameterValue
Operating temperature, max.70 °C
Operating temperature, min.-25 °C
Storage temperature, max.80 °C
Storage temperature, min.-40 °C
3VA1225-1AA32-0AG0 — Mechanical
ParameterValue
Mechanical service life (operating cycles), typ.15 000
Height158 mm
Width105 mm
Depth70 mm

Product details

It lands on a busbar connection via front terminals, which means the panel layout needs busbar stubs planned ahead; this isn't a cable-in/cable-out block.

Thermal derating and service life

At 55 °C it derates to 243 A, at 60 °C to 237 A, at 65 °C to 230 A, and at 70 °C to 223 A. That's a clean linear curve — no sudden drop-off, so you can push ambient to 60 °C and still carry 237 A continuous. The mechanical service life is 15 000 operating cycles typical, which is standard for a frame this size; if the application cycles more than once per shift, budget for a motor drive accessory (the design supports one).

Auxiliary switching and alarm

It ships with one auxiliary switch and one trip alarm switch, both HP (high-performance) contacts — 2 CO contacts total. If you need remote tripping, you'll order a different build state or add an external release later.

Voltage ratings and environmental limits

That covers most 400 V and 480 V distribution systems with headroom. The front face is IP40 — protected against tools and wires over 1 mm, but not sealed against dust ingress.

Frequently asked questions

What is the rated current of 3VA1225-1AA32-0AG0 at elevated temperatures?

It carries 250 A continuously from 40 °C to 50 °C, then derates linearly to 223 A at 70 °C.

What auxiliary contacts does this switch disconnector include?

It includes one auxiliary switch and one trip alarm switch, both HP type, providing 2 CO contacts total.

Where can I buy 3VA1225-1AA32-0AG0 and how is it quoted?

Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — no automated stock figure or list price applies here.

MPN
3VA1225-1AA32-0AG0